Mark Rand wrote:

Why did I say that :-(

It'll be either 4mm or .157" !!!!!

4MM or 5/32", 5/16" or 8 MM seem rather popular on this side of the pond. Of course the
fittings the tubing connects with tend to be NPT.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller